Digital fiber optic sensors convert measured objects into measurable optical signal sensors. Its working principle is to send the incident beam of the light source to the modulator through the optical fiber, and interact with the internal and external measurement parameters of the modulator to form a dimmable signal. How to use digital fiber optic sensors and what are their effects?
First, the application method of digital optical fiber sensor
1.SET button, which can be used to set sensitivity. The basic principle of the sensor is to use a fiber optic probe to sense the refractive index of different media, then obtain a digital signal, display it on the screen of a mobile phone, and send a switching value by comparing the displayed value with the set sensitivity value. 2. Indicator light, when the sensor has signal output, the light will be brighter or darker
2. "Set Sensitivity Value" will appear green on the phone screen to show the currently set sensitivity value. When the value collected by the probe becomes that value, the sensor constitutes the signal.
Second, the effect of digital fiber optic sensors
1. Measurement of water volume and density
The transmission power of a U-shaped fiber varies with the refractive index of the external medium. As an information carrier, the light wave matches the positive charge rate of the mixed fluid, and the flow pattern is independent of the water quality. Based on this principle, fiber density sensors fundamentally deal with the problems of high water content, no resolution, and the use of radioactive materials. The refractive index of water and gas is different for countless multiphase fluid oils, so the refractive index of the mixed fluid changes with the ratio of oil, water and air. Therefore, this refractive index-modulated fiber optic sensor can not only measure the durability of the fluid, but also measure the density of the fluid with high accuracy.
2. Acoustic measurement
Seismic waves are transmitted in different mediums and receive different seismic waveforms. According to different seismic waveforms, it can identify the sedimentary sequence and sedimentary structure of the strata, locate the reservoir, judge the honeypot, detect casing damage and cracks, and determine the perforation horizon and fluid flow.
How to use digital fiber optic sensors and what are their effects? The three-component seismic measurement of underground optical fiber has high sensitivity and directionality, and can produce high-precision spatial pictures. It can not only provide drawings of the near wellbore, but also the stratigraphy around the wellbore, measuring thousands of kilometers. It withstands environmental conditions, has no moving parts and non-substructure electronics, is impact-strong, has zero motion, and can be installed in complex, non-string spaces.
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